JPS5570850A - One-component developer for electrophotography and image forming method by using said developer - Google Patents
One-component developer for electrophotography and image forming method by using said developerInfo
- Publication number
- JPS5570850A JPS5570850A JP14354078A JP14354078A JPS5570850A JP S5570850 A JPS5570850 A JP S5570850A JP 14354078 A JP14354078 A JP 14354078A JP 14354078 A JP14354078 A JP 14354078A JP S5570850 A JPS5570850 A JP S5570850A
- Authority
- JP
- Japan
- Prior art keywords
- conductivity
- charge
- developer
- toner
- positive charge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Magnetic Brush Developing In Electrophotography (AREA)
- Developing For Electrophotography (AREA)
- Developing Agents For Electrophotography (AREA)
Abstract
PURPOSE: To charge the toner held in a developing device stably in one polarity and obtain a sharp toner image, by using a material differing in the conductivity of positive charge and in the conductivity of negative charge as the material to compose a developer.
CONSTITUTION: As a material having larger conductivity of positive charge than conductivity of netative charge, poly-N-vinyl carbazole or the like of electron donative property is used; as a material having larger conductivity of negative charge than conductivity of positive charge, phthalic anhydride or the like of electron receptive property is used. For example, in the development of negative electrostatic image, when a photoreceptor 1 of negative electrostatic image is developed with a toner 2 containing phthalic anhydride or the like together with magnetic powder and bond coloring agnet, by using a developing device 3 to which a positive bias voltage is applied from a power source 4, the positive charge of the toner is stably charged. Thus, preventing fringe phenomenon, a sharp toner image may be obtained.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14354078A JPS5570850A (en) | 1978-11-22 | 1978-11-22 | One-component developer for electrophotography and image forming method by using said developer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14354078A JPS5570850A (en) | 1978-11-22 | 1978-11-22 | One-component developer for electrophotography and image forming method by using said developer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5570850A true JPS5570850A (en) | 1980-05-28 |
Family
ID=15341116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14354078A Pending JPS5570850A (en) | 1978-11-22 | 1978-11-22 | One-component developer for electrophotography and image forming method by using said developer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5570850A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5062638A (en) * | 1973-10-04 | 1975-05-28 | ||
| JPS50133838A (en) * | 1974-04-09 | 1975-10-23 | ||
| JPS5126046A (en) * | 1974-08-28 | 1976-03-03 | Konishiroku Photo Ind | |
| JPS51103433A (en) * | 1975-03-10 | 1976-09-13 | Myakoshi Kikai Seisaku Kk | |
| JPS52106734A (en) * | 1976-03-03 | 1977-09-07 | Konishiroku Photo Ind Co Ltd | Picture formation |
-
1978
- 1978-11-22 JP JP14354078A patent/JPS5570850A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5062638A (en) * | 1973-10-04 | 1975-05-28 | ||
| JPS50133838A (en) * | 1974-04-09 | 1975-10-23 | ||
| JPS5126046A (en) * | 1974-08-28 | 1976-03-03 | Konishiroku Photo Ind | |
| JPS51103433A (en) * | 1975-03-10 | 1976-09-13 | Myakoshi Kikai Seisaku Kk | |
| JPS52106734A (en) * | 1976-03-03 | 1977-09-07 | Konishiroku Photo Ind Co Ltd | Picture formation |
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